It's interesting to note that a couple people have commented about the problems at the Baltimore Marriott Waterfront - I've had problems there too.

I would encourage everyone to take advantage of the new service where you get your final folio by email - that's how I spotted this charge, before it even hit my credit card.

In the past, you would see the charge on your credit card, know that it was for the wrong amount, but you'd then have to call the property to find out what the difference was for. At least now, it is possible to know what the discrepancy is prior to calling.